Effects of metallurgical properties and chemical compositions upon corrosion behaviour of cold rolled steels in hydrochloric acid electrolytes |
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Authors: | M. Wery V. Ligier J. Kirmann J.C. Catonné |
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Affiliation: | 1. Laboratoire de Corrosion et de Traitements de Surface, Université de Franche-Comté, 32 rue Mégevand, 25030 Besancon Cedex, France.;2. Laboratoire d'Electrochimie Industrielle, Conservatoire National des Arts et Métiers, 292 rue Saint Martin, 75141 Paris Cedex 03, France |
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Abstract: | This paper describes the experiments conducted to provide a measurable evidence in support of the widely accepted assumption that the pre-treatment of steel has a deciding effect upon the quality of subsequent plating, especially cyanide-free alkaline zinc plating. Special attention is given to the acid cleaning process. The effects of steel compositions and several pre-plating processes (industrial manufacture, heat-treatments) upon corrosion properties, are determined based on a statistic evaluation of a factorial test matrix termed (21x32) array. Corrosion behaviour is investigated by determining the weight loss, the potential evolution and the polarization measurements in HCl (220g.l-1). A galvanostatic method is subsequently used to evaluate the relative effectiveness of cleaning surface and the surface aptitude to be zinc plated. |
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Keywords: | acid cleaning low alloyed steel heat treatments experimental design alkaline zinc plating |
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